Arduino 3.22 tft lcd white screen


I currently have Arduino 3.2 tft lcd , TFT 3.2 Shield compatible with Arduino Mega2560 and mega 2560 board. my lcd screen is white asoon as I power it up. I have tried various sketches from online but all im getting is a white screen .
can anybody help me please?

Thank you



Hi spycatcher2k

The sheild i bought from amazon, here is a link Amazon Sign In


Sorry my bad